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1.The chemical hydrometer was used to measure the purity of the sample.
化学天平被用来测量样品的纯度。
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2.The chemical hydrometer showed that the sample contained trace amounts of impurities.
化学天平显示样品含有微量的杂质。
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3.The chemical hydrometer was used to determine the concentration of the solution.
化学天平用于确定溶液的浓度。